How much space between headliner and roof in a Defender?

[alittlebitconcerned]

Ive got the Puma's roof lining out after chasing a leak (rare, I know) and have decided that while its out I'll stick a 10mm thick foam sheet ontop of the roof lining for a bit of added sound deadening and insulation.

Before going ahead I want to make sure the lining will fit when its time to put it back. Does anyone have any idea roughly how much space I've got to play with?

[slug_burner]

Should be ok, there is a rib that is at least that deep. Might have to avoid covering the rib although I suspect that there is enough room for 10 mm sheet of insulation even on the rib.

Oops Puma might be a bit different as I think they use a molded liner as opposed to the earlier stretched vinyl

[alittlebitconcerned]

Should be ok, there is a rib that is at least that deep. Might have to avoid covering the rib although I suspect that there is enough room for 10 mm sheet of insulation even on the rib.

Oops Puma might be a bit different as I think they use a molded liner as opposed to the earlier stretched vinyl

Yeah, its molded. Thanks anyway.